@hingehead,
And now it's not. And the greater the crowd there is, the less likely that this will be irrelevant (which is why ebrown is just wrong).
That being said, there are some big holes in the tag code, for example thomas tagged threads "thomas" and then learned it was not useful and changed them, but the code isn't updating the aggregates right.
A big change is coming to the tagging features and the code that uses them very soon.